The objectives of this article were to design a low-cost three-phase AC voltagemeasurement circuit and new Android smartphone application to monitor the measuring voltage froma safe distance. The smart distance power electronic measurement (SDPEM) system was designed basedon an Arduino UNO R3 board used as a microcontroller to read and calculate the RMS values from athree-phase AC voltage measurement circuit (line-to-line or phase voltage of grid). Following this, themicrocontroller sends the measuring data by Bluetooth to an Android smartphone application. TheBluetooth shield V2.0 was used as a wireless communication instrument between the SDPEM and thesmartphone or tablet application. The smartphone monitoring application was a new applicationdesigned by the open-source developed program (MIT App Inventor 2) to monitor the three-phase ACvoltage results from a safe distance. The safe distance depends on the type of Bluetooth device used.The main advantages of the SDPEM system are low cost and safety.
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机译：本文的目的是设计一种低成本的三相交流电压测量电路和新的Android智能手机应用程序，以从安全距离监视测量电压。智能距离电力电子测量（SDPEM）系统是基于Arduino UNO R3板设计的，该板用作微控制器以读取和计算三相交流电压测量电路（电网的线到线或相电压）的RMS值。然后，微控制器通过蓝牙将测量数据发送到Android智能手机应用程序。蓝牙屏蔽V2.0用作SDPEM与智能手机或平板电脑应用程序之间的无线通信工具。智能手机监控应用程序是由开源开发程序（MIT App Inventor 2）设计的新应用程序，用于从安全距离监控三相交流电压结果。安全距离取决于所使用的蓝牙设备的类型。SDPEM系统的主要优点是低成本和安全性。
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